Ec integrated refrigerating unit

Abstract

The application belongs to the technical field of refrigeration equipment, and is especially an EC integrated refrigeration unit, which comprises a base, a defrosting device bin fixedly installed on the upper end face of the base, an outer shell fixedly installed on the outer side of the defrosting device bin and the upper end face of the base, a condenser fixedly installed on the upper end face of the outer shell, a rain shelter fixedly installed between the condenser and the outer shell, and an evaporator A fixedly installed on one side of the outer shell. The application is ready to use, and the unit is completely assembled, filled and tested in the factory. The user only needs to connect the power supply and a simple waterway (if necessary), which greatly shortens the installation time and eliminates the installation quality risks.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, specifically to an integrated EC refrigeration unit. Background Technology

[0002] Traditional refrigeration systems typically consist of separate evaporators, condensers, compressor units, and other auxiliary equipment, which are then connected on-site via complex piping and cables. These systems have the following significant drawbacks: long construction periods and complex installation, requiring professional construction personnel to perform operations such as equipment placement, refrigerant pipe welding, vacuuming, and electrical wiring. The long installation period and high cost, coupled with the fact that installation quality directly impacts system performance and reliability, make maintenance inconvenient. Key components are dispersed, requiring ample maintenance space, and there are numerous leak points, making troubleshooting and repair difficult. System energy efficiency is low; the decentralized layout results in long refrigerant pipelines, significant resistance losses, and often suboptimal matching between components, leaving room for improvement in overall system efficiency (SCOP). They occupy a large space, requiring dedicated refrigeration room for the refrigeration compressor unit, condenser, and auxiliary equipment, placing specific demands on the building structure and particularly unsuitable for "dry-to-cooling" conversion projects in existing buildings. Operation and maintenance are complex, with low system integration, dispersed fault points, and difficulties in diagnosis and maintenance, demanding high technical skills from maintenance personnel. Furthermore, for variable temperature storage systems with high user demand, two independent refrigeration systems are required, leading to complex system structures, cumbersome switching, and high costs.

[0003] While "integrated" refrigeration units exist on the market, most are condensing units, meaning they only combine the refrigeration compressor, auxiliary equipment, and condenser into one unit. They do not include an evaporator (air cooler), requiring on-site installation of the evaporator and connection of pipes and cables, thus failing to achieve true system integration. Therefore, there is an urgent need for a truly integrated refrigeration unit with higher integration, superior performance, and a better user experience. To address this, this solution proposes an EC integrated refrigeration unit. By highly integrating the evaporator, condenser, compressor, and auxiliary components, and combining this with EC (electronic commutation) motor technology, the unit can be shipped directly from the factory and installed on-site, effectively solving the aforementioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an integrated EC refrigeration unit, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated EC refrigeration unit, comprising a base, a defrosting device compartment fixedly installed on the upper surface of the base, an outer shell fixedly installed on the outer side of the defrosting device compartment and the upper surface of the base, a condenser fixedly installed on the upper surface of the outer shell, a rain shelter fixedly installed between the condenser and the outer shell, and an evaporator A fixedly installed on one side of the outer shell; A gas-liquid separator is fixedly connected to one side of the evaporator A via a pipe. A valve A is installed on the pipe between the gas-liquid separator and the economizer. A suction filter is also fixedly installed to the gas-liquid separator via a pipe. A valve B is installed on the pipe between the gas-liquid separator and the suction filter. A compressor is fixedly installed to the other side of the suction filter via a pipe. A valve C is installed on the pipe between the suction filter and the compressor. The compressor is divided into three circuits. One of the pipelines is fixedly connected to the economizer via a pipe, another pipeline is fixedly connected to the oil separator via a pipe, and yet another pipeline is also fixedly installed on the oil separator. The oil separator is fixedly installed on the condenser via a pipeline.

[0006] As a preferred embodiment of the present invention, the defrosting device compartment includes a defrosting mechanism base fixedly installed on the upper surface of the base. An insulated chamber is fixedly installed on the upper surface of the defrosting mechanism base. A vertical lifting door is fixedly installed on one side of the insulated chamber. A frame is also fixedly installed on the upper surface of the defrosting mechanism base. An evaporator B is fixedly installed on the lower side inside the frame. An axial flow fan is fixedly installed on the upper side inside the frame. Two sets of internal wind baffles are symmetrically installed on both sides of the frame. An air supply baffle is fixedly installed between one set of internal wind baffles. A rotating shaft is fixedly installed on the air supply baffle. The rotating shaft is fixedly connected to the internal wind baffles on both sides. The rotating shaft enables... The air supply baffle can rotate on the rotating shaft. One end of the air supply baffle moving mechanism is symmetrically installed on the lower inner side of the air supply baffle. The other end of the air supply baffle moving mechanism is fixedly installed on one side of the frame. A defrosting baffle is fixedly installed between a set of internal baffles on the other side. A rotating shaft B is rotatably installed on the lower inner side of the defrosting baffle. Both ends of the rotating shaft B are fixedly installed on a set of internal baffles. One end of the defrosting baffle moving mechanism is also fixedly installed on the inner side of the defrosting baffle. The other end of the defrosting baffle moving mechanism is fixedly installed on one side of the frame.

[0007] As a preferred embodiment of the present invention, the economizer is divided into two paths. One path is fixedly connected to the liquid supply solenoid valve via a pipe. A throttling device is fixedly connected to the other side of the liquid supply solenoid valve via a pipe. The other end of the throttling device is fixedly installed via a pipe and is also fixedly installed on the evaporator A via a pipe. The other path of the economizer is fixedly installed to one end of the dryer filter via a pipe. The other end of the dryer filter is fixedly connected to one side of the liquid storage tank via a pipe. The liquid storage tank is also fixedly connected to the condenser via a pipe.

[0008] As a preferred embodiment of the present invention, a refrigeration method is also included. S1. The gas discharged from the compressor enters the oil separator to separate the refrigeration oil, enters the condenser to condense into liquid, and flows into the liquid receiver. S2. The liquid refrigerant flows through the dryer filter to remove impurities and absorb water, and then is subcooled by the economizer. It is controlled by the liquid supply solenoid valve and the throttling device to reduce the pressure and enter the evaporator A to evaporate and absorb heat, turning into a gas. S3. The refrigerant gas enters the gas-liquid separator through the pipeline, is filtered by the suction filter, and then returns to the compressor to complete one refrigeration cycle. S4. The lubricating oil separated by the oil separator returns to the compressor through the oil return pipe; S5. The liquid output from the economizer is throttled and then enters the economizer, where it exchanges heat with the supplied liquid and evaporates before returning to the compressor.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention is ready to use and easy to install: the unit is fully assembled, filled and tested in the factory, and the user only needs to connect the power supply and a simple water circuit (if needed), which greatly shortens the installation time and eliminates potential installation quality problems.

[0010] 2. This invention features an optimized internal piping design that reduces pressure loss, and an intelligent control system that ensures the unit always operates at its optimal point. Simultaneously, the innovative air defrosting mode utilizes ambient heat for defrosting under suitable environmental conditions, significantly reducing defrosting energy consumption and resulting in an overall energy efficiency ratio significantly higher than traditional systems.

[0011] 3. This invention features intelligent and efficient defrosting: Through a unique channel switching structure, it achieves "isolated" air defrosting, effectively preventing the leakage of cold air from the warehouse while utilizing natural heat and cold to defrost, reducing temperature fluctuations and ensuring the safety of stored items. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 Schematic diagram of the defrosting unit compartment; Figure 5 Schematic diagram of an explosion in the defrosting unit compartment; Figure 6 This is a schematic diagram of the defrosting unit compartment.

[0013] In the diagram: 1. Base; 2. Defrosting unit compartment; 3. Outer shell; 4. Condenser; 5. Evaporator A; 6. Rain shelter; 7. Compressor; 8. Oil separator; 9. Liquid receiver; 10. Dryer filter; 11. Liquid supply solenoid valve; 12. Throttling device; 13. Gas-liquid separator; 14. Suction filter; 15. Economizer; 21. Insulated warehouse body; 22. Vertical lifting door; 23. Defrosting baffle; 24. Defrosting baffle moving mechanism; 25. Evaporator B; 26. Axial flow fan; 27. Internal baffle; 28. Air supply baffle; 29. ​​Air supply baffle moving mechanism; 20. Frame; 200. Defrosting mechanism base. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0015] Please see Figure 1-6 The present invention provides the following technical solution: an integrated EC refrigeration unit, including a base 1, a defrosting device compartment 2 fixedly installed on the upper surface of the base 1, an outer shell 3 fixedly installed on the outer side of the defrosting device compartment 2 and the upper surface of the base 1, a condenser 4 fixedly installed on the upper surface of the outer shell 3, a rain shelter 6 fixedly installed between the condenser 4 and the outer shell 3, and an evaporator A5 fixedly installed on one side of the outer shell 3. A gas-liquid separator 13 is fixedly connected to one side of the evaporator A5 via a pipe. A valve A is installed on the pipe between the gas-liquid separator 13 and the economizer 15. A suction filter 14 is also fixedly installed on the gas-liquid separator 13 via a pipe. A valve B is installed on the pipe between the gas-liquid separator 13 and the suction filter 14. A compressor 7 is fixedly installed on the other side of the suction filter 14 via a pipe. A valve C is installed on the pipe between the suction filter 14 and the compressor 7. The compressor 7 is divided into three circuits. One of them is fixedly connected to the economizer 15 through a pipe, another one is fixedly connected to the oil separator 8 through a pipe, and yet another one is also fixedly installed on the oil separator 8 through a pipe. The oil separator 8 is fixedly installed on the condenser 4 via a pipeline.

[0016] In this implementation scheme, the integrated EC refrigeration unit achieves a highly integrated structure by uniformly mounting the defrosting unit compartment 2, the outer shell 3 (containing the refrigeration unit compartment), the condenser 4, and the evaporator A5 on the base 1. The evaporator A5 is connected sequentially to the gas-liquid separator 13, the suction filter 14, and the compressor 7 via pipes, ensuring effective separation and filtration of liquid refrigerant and impurities in the return gas path. The high-pressure gas discharged from the compressor 7 is diverted through pipes to the oil separator 8 for lubricating oil separation, and then enters the top condenser 4 for heat exchange. This layout minimizes the distance of the refrigeration piping, reduces friction loss, and the rain shelter 6 ensures protection for outdoor installation. The overall structure is compact and occupies a small area.

[0017] Specifically, the defrosting device compartment 2 includes a defrosting mechanism base 200 fixedly installed on the upper surface of the base 1. An insulated chamber 21 is fixedly installed on the upper surface of the defrosting mechanism base 200. A vertical lifting door 22 is fixedly installed on one side of the insulated chamber 21. A frame 20 is also fixedly installed on the upper surface of the defrosting mechanism base 200. An evaporator B25 is fixedly installed on the lower side inside the frame 20. An axial flow fan 26 is fixedly installed on the upper side inside the frame 20. Two sets of internal air baffles 27 are symmetrically installed on both sides of the frame 20. An air supply baffle 28 is fixedly installed between one set of internal air baffles 27. A rotating shaft is fixedly installed on the air supply baffle 28, and the rotating shaft is fixedly connected to the internal air baffles 27 on both sides. A fixed connection is provided, and a rotating shaft allows the air supply baffle 28 to rotate on the rotating shaft. One end of the air supply baffle moving mechanism 29 is symmetrically installed on the lower inner side of the air supply baffle 28. The other end of the air supply baffle moving mechanism 29 is fixedly installed on one side of the frame 20. A defrosting baffle 23 is fixedly installed between a set of internal baffles 27 on the other side. A rotating shaft B is rotatably installed on the lower inner side of the defrosting baffle 23. Both ends of the rotating shaft B are fixedly installed on a set of internal baffles 27 respectively. One end of the defrosting baffle moving mechanism 24 is also fixedly installed on the inner side of the defrosting baffle 23. The other end of the defrosting baffle moving mechanism 24 is fixedly installed on one side of the frame 20.

[0018] In this embodiment, the specific structure of the defrosting device chamber 2 is as follows: Figure 5 , Figure 6As shown (referencing the original reference numerals), the base 200 integrates the insulated storage unit 21 and the frame 20. A vertical lifting door 22 is installed on one side of the insulated storage unit 21 to control the flow of defrosting air. The internal baffle 27, along with the air supply baffle 28 and defrosting baffle 23, forms a variable airflow channel: the air supply baffle 28 is driven by a rotating shaft and an air supply baffle moving mechanism 29 (preferably a servo electric cylinder), allowing it to rotate horizontally or vertically to close or divide the air vents; the defrosting baffle 23 is driven by a rotating shaft B and a defrosting baffle moving mechanism 24, allowing it to switch between a vertical state and an inclined divided state. When switched to defrosting mode, the defrosting baffle 23 divides the air inlet into an outside air inlet side and an outside air outlet side, while the air supply baffle 28 closes the air supply vent, ensuring that the outside hot air drawn by the axial fan 26 only flows through the evaporator B25 for defrosting. This effectively prevents the leakage of cold air from the storage unit, significantly reduces temperature fluctuations, and saves defrosting energy.

[0019] Specifically, the economizer 15 is divided into two paths. One path is fixedly connected to the liquid supply solenoid valve 11 via a pipe. The other side of the liquid supply solenoid valve 11 is fixedly connected to the throttling device 12 via a pipe. The other end of the throttling device 12 is fixedly installed via a pipe and is also fixedly installed on the evaporator A5 via a pipe. The other path of the economizer 15 is fixedly installed to one end of the dryer filter 10 via a pipe. The other end of the dryer filter 10 is fixedly connected to one side of the liquid receiver 9 via a pipe. The liquid receiver 9 is also fixedly connected to the condenser 4 via a pipe.

[0020] In this embodiment, the refrigerant supply and throttling sides of the refrigeration cycle are connected as follows: Economizer 15 serves as a subcooling enhancement component. Its main outlet is fixedly connected to refrigerant supply solenoid valve 11 via a pipe. Refrigerant supply solenoid valve 11 is used to precisely control the refrigerant flow. It is then connected to throttling device 12 (preferably an electronic expansion valve) via a pipe. The outlet of throttling device 12 is directly connected to the inlet of evaporator A5 via a pipe to achieve pressure reduction evaporation and heat absorption. Simultaneously, another auxiliary circuit of economizer 15 is connected to one end of dryer filter 10 via a pipe. Dryer filter 10 is used to filter out moisture and impurities in the system. Its other end is fixedly connected to the outlet side of receiver 9 via a pipe. Receiver 9 receives high-pressure liquid from the bottom of condenser 4 via a pipe, ensuring a stable refrigerant supply. This connection method ensures that the liquid refrigerant undergoes drying, subcooling, and precise throttling before entering the evaporator, significantly improving the efficiency and stability of the refrigeration cycle.

[0021] Specifically, it also includes a refrigeration method. S1. The gas discharged from the compressor 7 enters the oil separator 8 to separate the refrigeration oil, which enters the condenser 4 to condense into liquid and flows into the liquid receiver 9. S2. Liquid refrigerant flows through dryer filter 10 to remove impurities and absorb water, and then is subcooled by economizer 15. It is then controlled by liquid supply solenoid valve 11 and throttled and depressurized by throttling device 12 before entering evaporator A5 to evaporate and absorb heat, turning into gas. S3. The refrigerant gas enters the gas-liquid separator 13 through the pipeline, is filtered by the suction filter 14, and then returns to the compressor 7 to complete one refrigeration cycle. S4. The lubricating oil separated by the oil separator 8 returns to the compressor 7 through the oil return pipe; S5 and Economizer 15 lead out a liquid path, which enters Economizer 15 after throttling. After exchanging heat with the supplied liquid and evaporating, the liquid returns to compressor 7.

[0022] In this embodiment, refrigeration methods S1 to S5 describe the complete refrigerant circulation and auxiliary oil return and enthalpy increase process within the unit. In steps S1 and S2, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 7 is converted into liquid by the oil separator 8 and condenser 4. The connection between the liquid receiver 9 and the dryer filter 10 ensures the cleanliness and continuity of the liquid supply. The connection design of the economizer 15 further subcools the main liquid, improving the cooling capacity per unit mass of refrigerant. In steps S3 and S4, the low-temperature, low-pressure gas from the outlet of the evaporator A5 is connected to the gas-liquid separator 13 through a pipeline, effectively preventing liquid slugging accidents in the compressor 7. After purification by the suction filter 14, the safe operation of the compressor is ensured. The oil separator 8 is connected to the crankcase of the compressor 7 through the oil return pipe, maintaining the normal operation of the compressor lubrication system. In step S5, the branch from the economizer 15 returns to the vapor injection enthalpy interface of the compressor 7 after throttling. This connection method significantly improves the heating capacity and energy efficiency ratio under low temperature conditions, enabling the unit to have the dual technical effects of wide temperature range operation and high energy efficiency.

[0023] In this embodiment, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated EC refrigeration unit, comprising a base (1), characterized in that: A defrosting device compartment (2) is fixedly installed on the upper surface of the base (1). A shell (3) is fixedly installed on the outer side of the defrosting device compartment (2) and the upper surface of the base (1). A condenser (4) is fixedly installed on the upper surface of the shell (3). A rain shelter (6) is also fixedly installed between the condenser (4) and the shell (3). An evaporator A (5) is fixedly installed on one side of the shell (3). A gas-liquid separator (13) is fixedly connected to one side of the evaporator A (5) via a pipe. A valve A is installed on the pipe between the gas-liquid separator (13) and the economizer (15). A suction filter (14) is also fixedly installed on the gas-liquid separator (13) via a pipe. A valve B is installed on the pipe between the gas-liquid separator (13) and the suction filter (14). A compressor (7) is fixedly installed on the other side of the suction filter (14) via a pipe. A valve C is installed on the pipe between the suction filter (14) and the compressor (7). The compressor (7) is divided into three circuits. One of them is fixedly connected to the economizer (15) through a pipeline, one of them is fixedly connected to the oil separator (8) through a pipeline, and one of them is also fixedly installed on the oil separator (8) through a pipeline. The oil separator (8) is fixedly installed on the condenser (4) via a pipeline.

2. The integrated EC refrigeration unit according to claim 1, characterized in that: The defrosting device compartment (2) includes a defrosting mechanism base (200) fixedly installed on the upper surface of the base (1). An insulated chamber (21) is fixedly installed on the upper surface of the defrosting mechanism base (200). A vertical lifting door (22) is fixedly installed on one side of the insulated chamber (21). A frame (20) is also fixedly installed on the upper surface of the defrosting mechanism base (200). An evaporator B (25) is fixedly installed on the lower side inside the frame (20). An axial flow fan (26) is fixedly installed on the upper side inside the frame (20). Two sets of internal baffles (27) are symmetrically installed on both sides of the frame (20). An air supply baffle (28) is fixedly installed between one set of internal baffles (27). A rotating shaft is fixedly installed on the air supply baffle (28). The rotating shaft and the internal baffles (27) on both sides are connected. The rotating shaft allows the air supply baffle (28) to rotate on the rotating shaft. One end of the air supply baffle moving mechanism (29) is symmetrically installed on the lower inner side of the air supply baffle (28). The other end of the air supply baffle moving mechanism (29) is fixedly installed on one side of the frame (20). A defrosting baffle (23) is fixedly installed between a set of internal baffles (27) on the other side. A rotating shaft B is rotatably installed on the lower inner side of the defrosting baffle (23). Both ends of the rotating shaft B are fixedly installed on a set of internal baffles (27). One end of the defrosting baffle moving mechanism (24) is also fixedly installed on the inner side of the defrosting baffle (23). The other end of the defrosting baffle moving mechanism (24) is fixedly installed on one side of the frame (20).

3. The integrated EC refrigeration unit according to claim 1, characterized in that: The economizer (15) is divided into two paths. One path is fixedly connected to the liquid supply solenoid valve (11) through a pipe. The other side of the liquid supply solenoid valve (11) is fixedly connected to a throttling device (12) through a pipe. The other end of the throttling device (12) is fixedly installed on the evaporator A (5) through a pipe. The other path of the economizer (15) is fixedly installed on one end of the dryer filter (10) through a pipe. The other end of the dryer filter (10) is fixedly connected to one side of the liquid storage tank (9) through a pipe. The liquid storage tank (9) is also fixedly connected to the condenser (4) through a pipe.

4. An integrated EC refrigeration unit according to any one of claims 1-3, characterized in that: It also includes a refrigeration method. S1. The compressor (7) discharges gas into the oil separator (8) to separate the refrigeration oil, which then enters the condenser (4) to condense into liquid and flows into the liquid receiver (9). S2. The liquid refrigerant flows through the dryer filter (10) to remove impurities and absorb water, and then is subcooled by the economizer (15). It is then controlled by the liquid supply solenoid valve (11) and throttled and depressurized by the throttling device (12) before entering the evaporator A (5) to evaporate and absorb heat, becoming a gas. S3. The refrigerant gas enters the gas-liquid separator (13) through the pipeline, is filtered by the suction filter (14), and returns to the compressor (7) to complete a refrigeration cycle; S4. The lubricating oil separated by the oil separator (8) returns to the compressor (7) through the oil return pipe. S5. The economizer (15) leads out a liquid path, which enters the economizer (15) after being throttled, and returns to the compressor (7) after exchanging heat with the supplied liquid and evaporating.

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